Radiator thermometer-cap.



D. P. FRASER.

` RADIATOR THERMOMETER CAP.

APPLICATION FILED DEC.9. 1914.

IBI W/T/I/ESSES DonnIIjf FV: u.

the ileriplicry of its base 2S secured in the aforesaid indicator casing rim and in the apex of the cone is secured a lamp 29.

At 3() is arranged a plate of frosted glass between Ithe lamp and the thermometer stein, and on this plate of glass are formed a series of graduations 3l whiclrare plainly visible on the rear face of tlieglass when the lamp is lighted, but since the glass plate is frosted or ground, the observer is not disturbed by the glare of light from the lamp. The inner face ofthe cone `may be .formed as a reflector to intensify the 'effect of the light, if desired. -4

The Wires 32 connected to the lamp extend downwardly through the indicator casing and 'shank 24: t0 a pair of terminals tlllocated in the rear portion of the disk of the section 13 and 'terminate in cup-shaped insulated members 34 carried permanently by said movable section. I

At 35 is formed a housing as a partof the collarl into and through which a pair 01"' terminals 36 extend from any suitable direction but shownherein as extending from the outside of the cap and insulated vat fromthe metal of .theca Conductor..

A wires 38-lead lfrom any suita le source of electricity to the terminals-36. Obviously a .switch (notfshown) maybe-.located in the y 'circuitofthefwifres 38'andl in reach oftheY operator-for control of the lamp 29. The

terminalsf may be of any suitable form but' I prefer to imake themJ curved so as to be loeated'well below'the rim 17 of the collar and the upper ends ofthe terminalsa-re isos' preferably formed on. ares el? ci es whose centers coincide with; the axis ot the liin 18. It will be appreciated, therefore, tha l the section lf?) of the cap may "ing freely "it around the' hinge, the terminals li and cupa 34' passing freely from or upon the points of the terminals 36 while the section thus swinging in either direction aimmd its` hinge. te

I claim:

.respectively and insulated. therefrom, the` contacts carried by the fixed section being.` curved on arcs of circles concentric with tht` axis'of the hinge aforesaid and projecting into-sockets of the movable section whereby thecurrent is completed through the lamp when 'the cap' is closed, substantially as scf; forth.

In testimony whereof I have signed my name. to this specification in the presence di' two subscribing Witnesses.

DQNNELLY l. IFBASER. -Witnessesz GEO. L. BEELER, PHiLIP D. RoLLnAUs.

il li 

